A290812 - cp's OEIS frontend

A290812 Odd composite numbers m such that k^(m - 1) == 1 (mod m) and gcd(k^((m - 1)/2) - 1, m) = 1 for some integer k in the interval [2, sqrt(m) + 1].

n	a(n)
1	91
2	247
3	325
4	343
5	485
6	703
7	871
8	901
9	931
10	949
11	1099
12	1111
13	1157
14	1247
15	1261
16	1271
17	1387
18	1445
19	1525
20	1649
21	1765
22	1807
23	1891
24	1975
25	2047
26	2059
27	2071
28	2117
29	2501
30	2701
31	2863
32	2871
33	3277
34	3281
35	3365
36	3589
37	3845
38	4069
39	4141
40	4187
41	4291
42	4371
43	4411
44	4525

[91, 247, 325, 343, 485, 703, 871, 901, 931, 949, 1099, 1111, 1157, 1247, 1261, 1271, 1387, 1445, 1525, 1649, 1765, 1807, 1891, 1975, 2047, 2059, 2071, 2117, 2501, 2701, 2863, 2871, 3277, 3281, 3365, 3589, 3845, 4069, 4141, 4187, 4291, 4371, 4411, 4525]

cp's OEIS Frontend

A290812 Odd composite numbers m such that k^(m - 1) == 1 (mod m) and gcd(k^((m - 1)/2) - 1, m) = 1 for some integer k in the interval [2, sqrt(m) + 1].

Table of values

List of values